<?php
class Product { // 产品本身
    private $_parts; 
    public function __construct() { $this->_parts = array(); } 
    public function add($part) { return array_push($this->_parts, $part); }
}
 
abstract class Builder { // 建造者抽象类
    public abstract function buildPart1();
    public abstract function buildPart2();
    public abstract function getResult();
}
 
class ConcreteBuilder extends Builder { // 具体建造者
    private $_product;
    public function __construct() { $this->_product = new Product(); }
    public function buildPart1() { $this->_product->add("Part1"); } 
    public function buildPart2() { $this->_product->add("Part2"); }
    public function getResult() { return $this->_product; }
}
 
class Director { 
    public function __construct(Builder $builder) {
        $builder->buildPart1();
        $builder->buildPart2();
    }
}
// client 
$buidler = new ConcreteBuilder();
$director = new Director($buidler);
$product = $buidler->getResult();
?>

<?php 
public class Singleton {
    private static $_instance = NULL;
    // 私有构造方法 
    private function __construct() {}
    public static function getInstance() {
        if (is_null(self::$_instance)) {
            self::$_instance = new Singleton();
        }
        return self::$_instance;
    }
    // 防止克隆实例
    public function __clone(){
        die('Clone is not allowed.' . E_USER_ERROR);
    }
}
?>

<?php
interface Target {
    public function sampleMethod1();
    public function sampleMethod2();
}
 
class Adaptee { // 源角色
    public function sampleMethod1() {}
}
 
class Adapter extends Adaptee implements Target { // 适配后角色
    public function sampleMethod2() {} 
}
 
// client
$adapter = new Adapter();
$adapter->sampleMethod1();
$adapter->sampleMethod2(); 
?>

<?php
interface Target {
    public function sampleMethod1();
    public function sampleMethod2();
}
 
class Adaptee {
    public function sampleMethod1() {}
}
 
class Adapter implements Target {
    private $_adaptee;
    public function __construct(Adaptee $adaptee) {
        $this->_adaptee = $adaptee;
    }
 
    public function sampleMethod1() { $this->_adaptee->sampleMethod1(); }
 
    public function sampleMethod2() {}
}
 
$adaptee = new Adaptee();
$adapter = new Adapter($adaptee);
$adapter->sampleMethod1();
$adapter->sampleMethod2();
?>

<?php
abstract class Abstraction { // 抽象化角色，抽象化给出的定义，并保存一个对实现化对象的引用。    
    protected $imp; // 对实现化对象的引用
    public function operation() {
        $this->imp->operationImp();
    }
}
 
class RefinedAbstraction extends Abstraction { // 修正抽象化角色, 扩展抽象化角色，改变和修正父类对抽象化的定义。
     public function __construct(Implementor $imp) {
        $this->imp = $imp;
    }
    public function operation() { $this->imp->operationImp(); }
}
 
abstract class Implementor { // 实现化角色, 给出实现化角色的接口，但不给出具体的实现。
    abstract public function operationImp();
}
 
class ConcreteImplementorA extends Implementor { // 具体化角色A
    public function operationImp() {}
}
 
class ConcreteImplementorB extends Implementor { // 具体化角色B
    public function operationImp() {}
}
 
// client
$abstraction = new RefinedAbstraction(new ConcreteImplementorA());
$abstraction->operation();
$abstraction = new RefinedAbstraction(new ConcreteImplementorB());
$abstraction->operation();
?>

<?php
interface Component {
    public function getComposite(); //返回自己的实例
    public function operation();
}
 
class Composite implements Component { // 树枝组件角色
    private $_composites;
    public function __construct() { $this->_composites = array(); }
    public function getComposite() { return $this; }
     public function operation() {
         foreach ($this->_composites as $composite) {
            $composite->operation();
        }
     }
 
    public function add(Component $component) {  //聚集管理方法 添加一个子对象
        $this->_composites[] = $component;
    }
 
    public function remove(Component $component) { // 聚集管理方法 删除一个子对象
        foreach ($this->_composites as $key => $row) {
            if ($component == $row) { unset($this->_composites[$key]); return TRUE; }
        } 
        return FALSE;
    }
    public function getChild() { // 聚集管理方法 返回所有的子对象
       return $this->_composites;
    }
 
}
 
class Leaf implements Component {
    private $_name; 
    public function __construct($name) { $this->_name = $name; }
    public function operation() {}
    public function getComposite() {return null;}
}
 
// client
$leaf1 = new Leaf('first');
$leaf2 = new Leaf('second');
$composite = new Composite();
$composite->add($leaf1);
$composite->add($leaf2);
$composite->operation();
$composite->remove($leaf2);
$composite->operation();
?>

<?php
interface Component { // 抽象组件角色
    public function getComposite(); // 返回自己的实例
    public function operation(); // 示例方法
    public function add(Component $component); // 聚集管理方法,添加一个子对象
    public function remove(Component $component); // 聚集管理方法 删除一个子对象
    public function getChild(); // 聚集管理方法 返回所有的子对象
}
 
class Composite implements Component { // 树枝组件角色
    private $_composites;
    public function __construct() { $this->_composites = array(); } 
    public function getComposite() { return $this; }
    public function operation() { // 示例方法，调用各个子对象的operation方法
        foreach ($this->_composites as $composite) {
            $composite->operation();
        }
    }
    public function add(Component $component) { // 聚集管理方法 添加一个子对象
        $this->_composites[] = $component;
    }
    public function remove(Component $component) { // 聚集管理方法 删除一个子对象
        foreach ($this->_composites as $key => $row) {
            if ($component == $row) { unset($this->_composites[$key]); return TRUE; }
        } 
        return FALSE;
    }
    public function getChild() { // 聚集管理方法 返回所有的子对象
       return $this->_composites;
    }
 
}
 
class Leaf implements Component {
    private $_name;
    public function __construct($name) {$this->_name = $name;}
    public function operation() {}
    public function getComposite() { return null; }
    public function add(Component $component) { return FALSE; }
    public function remove(Component $component) { return FALSE; }
    public function getChild() { return null; }
}
 
// client 
$leaf1 = new Leaf('first');
$leaf2 = new Leaf('second');
$composite = new Composite();
$composite->add($leaf1);
$composite->add($leaf2);
$composite->operation();
$composite->remove($leaf2);
$composite->operation();
?>

<?php
interface Component {
    public function operation();
}
 
abstract class Decorator implements Component{ // 装饰角色 
    protected  $_component;
    public function __construct(Component $component) {
        $this->_component = $component;
    }
    public function operation() {
        $this->_component->operation();
    }
}
 
class ConcreteDecoratorA extends Decorator { // 具体装饰类A
    public function __construct(Component $component) {
        parent::__construct($component);
    } 
    public function operation() {
        parent::operation();    //  调用装饰类的操作
        $this->addedOperationA();   //  新增加的操作
    }
    public function addedOperationA() {}
}
class ConcreteDecoratorB extends Decorator { // 具体装饰类B
    public function __construct(Component $component) {
        parent::__construct($component);
    } 
    public function operation() {
        parent::operation();
        $this->addedOperationB();
    }
    public function addedOperationB() {}
}
 
class ConcreteComponent implements Component{ 
    public function operation() {} 
}
 
// clients
$component = new ConcreteComponent();
$decoratorA = new ConcreteDecoratorA($component);
$decoratorB = new ConcreteDecoratorB($decoratorA);
$decoratorA->operation();
$decoratorB->operation();
?>

<?php
class Camera {
    public function turnOn() {}
    public function turnOff() {}
    public function rotate($degrees) {}
}
 
class Light {
    public function turnOn() {}
    public function turnOff() {}
    public function changeBulb() {}
}
 
class Sensor {
    public function activate() {}
    public function deactivate() {}
    public function trigger() {}
}
 
class Alarm {
    public function activate() {}
    public function deactivate() {}
    public function ring() {}
    public function stopRing() {}
}
 
class SecurityFacade {
    private $_camera1, $_camera2;
    private $_light1, $_light2, $_light3;
    private $_sensor;
    private $_alarm;
 
    public function __construct() {
        $this->_camera1 = new Camera();
        $this->_camera2 = new Camera();
 
        $this->_light1 = new Light();
        $this->_light2 = new Light();
        $this->_light3 = new Light();
 
        $this->_sensor = new Sensor();
        $this->_alarm = new Alarm();
    }
 
    public function activate() {
        $this->_camera1->turnOn();
        $this->_camera2->turnOn();
 
        $this->_light1->turnOn();
        $this->_light2->turnOn();
        $this->_light3->turnOn();
 
        $this->_sensor->activate();
        $this->_alarm->activate();
    }
 
    public  function deactivate() {
        $this->_camera1->turnOff();
        $this->_camera2->turnOff();
 
        $this->_light1->turnOff();
        $this->_light2->turnOff();
        $this->_light3->turnOff();
 
        $this->_sensor->deactivate();
        $this->_alarm->deactivate();
    }
}
 
 
//client 
$security = new SecurityFacade();
$security->activate();
?>

<?php
abstract class Flyweight { // 抽象享元角色
    abstract public function operation($state);
}
 
class ConcreteFlyweight extends Flyweight { // 具体享元角色
    private $_intrinsicState = null; 
    public function __construct($state) {
        $this->_intrinsicState = $state;
    }
    public function operation($state) {}
}
 
class UnsharedConcreteFlyweight extends Flyweight { // 不共享的具体享元，客户端直接调用
    private $_intrinsicState = null;
    public function __construct($state) {
        $this->_intrinsicState = $state;
    }
    public function operation($state) {}
}
class FlyweightFactory { // 享元工厂角色 
    private $_flyweights;
    public function __construct() {
        $this->_flyweights = array();
    }
    public function getFlyweigth($state) {
        if (isset($this->_flyweights[$state])) {
            return $this->_flyweights[$state];
        } else {
            return $this->_flyweights[$state] = new ConcreteFlyweight($state);
        }
    }
}
 
// client
$flyweightFactory = new FlyweightFactory();
$flyweight = $flyweightFactory->getFlyweigth('state A');
$flyweight->operation('other state A');
$flyweight = $flyweightFactory->getFlyweigth('state B');
$flyweight->operation('other state B');
// 不共享的对象，单独调用
$uflyweight = new UnsharedConcreteFlyweight('state A');
$uflyweight->operation('other state A');
?>

<?php
interface Subject { // 抽象主题角色
    public function attach(Observer $observer); // 增加一个新的观察者对象
    public function detach(Observer $observer); // 删除一个已注册过的观察者对象
    public function notifyObservers(); // 通知所有注册过的观察者对象
}
class ConcreteSubject implements Subject { // 具体主题角色
    private $_observers; 
    public function __construct() { $this->_observers = array(); }
    public function attach(Observer $observer) {
        return array_push($this->_observers, $observer);
    }
    public function detach(Observer $observer) {
        $index = array_search($observer, $this->_observers);
        if ($index === FALSE || ! array_key_exists($index, $this->_observers)) {
            return FALSE;
        } 
        unset($this->_observers[$index]);
        return TRUE;
    }
    public function notifyObservers() {
        if (!is_array($this->_observers)) { return FALSE; } 
        foreach ($this->_observers as $observer) { 
            $observer->update(); 
        } 
        return TRUE;
    }
 
}
interface Observer { // 抽象观察者角色
    public function update(); // 更新方法
}
 
class ConcreteObserver implements Observer {
    private $_name; 
    public function __construct($name) { $this->_name = $name; }
    public function update() {}
}
 
$subject = new ConcreteSubject();
/* 添加第一个观察者 */
$observer1 = new ConcreteObserver('Mac');
$subject->attach($observer1);
$subject->notifyObservers(); // 主题变化，通知观察者
/* 添加第二个观察者 */
$observer2 = new ConcreteObserver('Win');
$subject->attach($observer2);
$subject->notifyObservers();
$subject->detach($observer1);
$subject->notifyObservers();
?>

<?php
interface Prototype { public function copy(); }
 
class ConcretePrototype implements Prototype{
    private  $_name;
    public function __construct($name) { $this->_name = $name; } 
    public function copy() { return clone $this;}
}
 
class Demo {}
 
// client
 
$demo = new Demo();
$object1 = new ConcretePrototype($demo);
$object2 = $object1->copy();
?>

<?php
abstract class Subject { // 抽象主题角色
    abstract public function action();
}
class RealSubject extends Subject { // 真实主题角色
    public function __construct() {}
    public function action() {}
}
class ProxySubject extends Subject { // 代理主题角色
    private $_real_subject = NULL;
    public function __construct() {}
    public function action() {
        $this->_beforeAction();
        if (is_null($this->_real_subject)) {
            $this->_real_subject = new RealSubject();
        }
        $this->_real_subject->action();
        $this->_afterAction();
    }
    private function _beforeAction() {}
    private function _afterAction() {}
}
// client
$subject = new ProxySubject();
$subject->action();
?>

<?php
interface Strategy { // 抽象策略角色，以接口实现
    public function algorithmInterface(); // 算法接口
}
class ConcreteStrategyA implements Strategy { // 具体策略角色A 
    public function algorithmInterface() {}
}
class ConcreteStrategyB implements Strategy { // 具体策略角色B 
    public function algorithmInterface() {}
}
class ConcreteStrategyC implements Strategy { // 具体策略角色C
    public function algorithmInterface() {}
}
 
class Context { // 环境角色
    private $_strategy;
    public function __construct(Strategy $strategy) {
        $this->_strategy = $strategy;
    } 
    public function contextInterface() {
        $this->_strategy->algorithmInterface();
    }
}
 
// client
$strategyA = new ConcreteStrategyA();
$context = new Context($strategyA);
$context->contextInterface();
$strategyB = new ConcreteStrategyB();
$context = new Context($strategyB);
$context->contextInterface();
$strategyC = new ConcreteStrategyC();
$context = new Context($strategyC);
$context->contextInterface();
?>

<?php
interface Command { // 命令角色
    public function execute(); // 执行方法
}
class ConcreteCommand implements Command { // 具体命令方法 
    private $_receiver; 
    public function __construct(Receiver $receiver) {
        $this->_receiver = $receiver;
    }
    public function execute() {
        $this->_receiver->action();
    }
}
class Receiver { // 接收者角色
    private $_name;
    public function __construct($name) {
        $this->_name = $name;
    }
    public function action() { }
}
class Invoker { // 请求者角色
    private $_command; 
    public function __construct(Command $command) {
        $this->_command = $command;
    }
    public function action() {
        $this->_command->execute();
    }
}
 
$receiver = new Receiver('hello world');
$command = new ConcreteCommand($receiver);
$invoker = new Invoker($command);
$invoker->action();
?>

<?php
class Expression { 
    function interpreter($str) { 
        return $str; 
    } 
} 
class ExpressionNum extends Expression { 
    function interpreter($str) { 
        switch($str) { 
            case "0": return "零"; 
            case "1": return "一"; 
            case "2": return "二"; 
            case "3": return "三"; 
            case "4": return "四"; 
            case "5": return "五"; 
            case "6": return "六"; 
            case "7": return "七"; 
            case "8": return "八"; 
            case "9": return "九"; 
        } 
    } 
} 
class ExpressionCharater extends Expression { 
    function interpreter($str) { 
        return strtoupper($str); 
    } 
} 
class Interpreter { 
    function execute($string) { 
        $expression = null; 
        for($i = 0;$i<strlen($string);$i++) { 
            $temp = $string[$i]; 
            switch(true) { 
                case is_numeric($temp): $expression = new ExpressionNum(); break; 
                default: $expression = new ExpressionCharater(); 
            } 
            echo $expression->interpreter($temp); 
        } 
    } 
} 
//client
$obj = new Interpreter(); 
$obj->execute("12345abc"); 
?>

<?php
class sample implements Iterator {
    private $_items ;
 
    public function __construct(&$data) {
        $this->_items = $data;
    }
    public function current() {
        return current($this->_items);
    }
 
    public function next() {
        next($this->_items);   
    }
 
    public function key() {
        return key($this->_items);
    }
 
    public function rewind() {
        reset($this->_items);
    }
 
    public function valid() {                                                                              
        return ($this->current() !== FALSE);
    }
}
 
// client
$data = array(1, 2, 3, 4, 5);
$sa = new sample($data);
foreach ($sa AS $key => $row) {
    echo $key, ' ', $row, '<br />';
}
?>

<?php
abstract class Mediator { // 中介者角色
    abstract public function send($message,$colleague); 
} 
abstract class Colleague { // 抽象对象
    private $_mediator = null; 
    public function __construct($mediator) { 
        $this->_mediator = $mediator; 
    } 
    public function send($message) { 
        $this->_mediator->send($message,$this); 
    } 
    abstract public function notify($message); 
} 
class ConcreteMediator extends Mediator { // 具体中介者角色
    private $_colleague1 = null; 
    private $_colleague2 = null; 
    public function send($message,$colleague) { 
        if($colleague == $this->_colleague1) { 
            $this->_colleague1->notify($message); 
        } else { 
            $this->_colleague2->notify($message); 
        } 
    }
    public function set($colleague1,$colleague2) { 
        $this->_colleague1 = $colleague1; 
        $this->_colleague2 = $colleague2; 
    } 
} 
class Colleague1 extends Colleague { // 具体对象角色
    public function notify($message) { } 
} 
class Colleague2 extends Colleague { // 具体对象角色
    public function notify($message) { } 
} 
// client
$objMediator = new ConcreteMediator(); 
$objC1 = new Colleague1($objMediator); 
$objC2 = new Colleague2($objMediator); 
$objMediator->set($objC1,$objC2); 
$objC1->send("to c2 from c1"); 
$objC2->send("to c1 from c2"); 
?>

<?php
class Originator { // 发起人(Originator)角色
    private $_state;
    public function __construct() {
        $this->_state = '';
    }
    public function createMemento() { // 创建备忘录
        return new Memento($this->_state);
    }
    public function restoreMemento(Memento $memento) { // 将发起人恢复到备忘录对象记录的状态上
        $this->_state = $memento->getState();
    }
    public function setState($state) { $this->_state = $state; } 
    public function getState() { return $this->_state; }
    public function showState() {}
 
}
class Memento { // 备忘录(Memento)角色 
    private $_state;
    public function __construct($state) {
        $this->setState($state);
    }
    public function getState() { return $this->_state; } 
    public function setState($state) { $this->_state = $state;}
}
class Caretaker { // 负责人(Caretaker)角色 
    private $_memento;
    public function getMemento() { return $this->_memento; } 
    public function setMemento(Memento $memento) { $this->_memento = $memento; }
}
 
// client
/* 创建目标对象 */
$org = new Originator();
$org->setState('open');
$org->showState();
/* 创建备忘 */
$memento = $org->createMemento();
/* 通过Caretaker保存此备忘 */
$caretaker = new Caretaker();
$caretaker->setMemento($memento);
/* 改变目标对象的状态 */
$org->setState('close');
$org->showState();
/* 还原操作 */
$org->restoreMemento($caretaker->getMemento());
$org->showState();
?>

<?php
interface Visitor { // 抽象访问者角色
    public function visitConcreteElementA(ConcreteElementA $elementA);
    public function visitConcreteElementB(concreteElementB $elementB);
}
 
interface Element { // 抽象节点角色
    public function accept(Visitor $visitor);
}
 
class ConcreteVisitor1 implements Visitor { // 具体的访问者1
    public function visitConcreteElementA(ConcreteElementA $elementA) {}
    public function visitConcreteElementB(ConcreteElementB $elementB) {}
}
class ConcreteVisitor2 implements Visitor { // 具体的访问者2
    public function visitConcreteElementA(ConcreteElementA $elementA) {}
    public function visitConcreteElementB(ConcreteElementB $elementB) {}
}
class ConcreteElementA implements Element { // 具体元素A
    private $_name;
    public function __construct($name) { $this->_name = $name; } 
    public function getName() { return $this->_name; }
    public function accept(Visitor $visitor) { // 接受访问者调用它针对该元素的新方法
        $visitor->visitConcreteElementA($this);
    }
}
class ConcreteElementB implements Element { // 具体元素B
    private $_name; 
    public function __construct($name) { $this->_name = $name;}
    public function getName() { return $this->_name; }
    public function accept(Visitor $visitor) { // 接受访问者调用它针对该元素的新方法
        $visitor->visitConcreteElementB($this);
    }
}
class ObjectStructure { // 对象结构 即元素的集合
    private $_collection; 
    public function __construct() { $this->_collection = array(); } 
    public function attach(Element $element) {
        return array_push($this->_collection, $element);
    }
    public function detach(Element $element) {
        $index = array_search($element, $this->_collection);
        if ($index !== FALSE) {
            unset($this->_collection[$index]);
        }
        return $index;
    }
    public function accept(Visitor $visitor) {
        foreach ($this->_collection as $element) {
            $element->accept($visitor);
        }
    }
}
// client
$elementA = new ConcreteElementA("ElementA");
$elementB = new ConcreteElementB("ElementB");
$elementA2 = new ConcreteElementB("ElementA2");
$visitor1 = new ConcreteVisitor1();
$visitor2 = new ConcreteVisitor2();
$os = new ObjectStructure();
$os->attach($elementA);
$os->attach($elementB);
$os->attach($elementA2);
$os->detach($elementA);
$os->accept($visitor1);
$os->accept($visitor2);
?>

<?php
interface State { // 抽象状态角色
    public function handle(Context $context); // 方法示例
}
class ConcreteStateA implements State { // 具体状态角色A
    private static $_instance = null;
    private function __construct() {}
    public static function getInstance() { // 静态工厂方法，返还此类的唯一实例
        if (is_null(self::$_instance)) {
            self::$_instance = new ConcreteStateA();
        }
        return self::$_instance;
    }
 
    public function handle(Context $context) {
        $context->setState(ConcreteStateB::getInstance());
    }
 
}
class ConcreteStateB implements State { // 具体状态角色B
    private static $_instance = null;
    private function __construct() {}
    public static function getInstance() {
        if (is_null(self::$_instance)) {
            self::$_instance = new ConcreteStateB();
        }
        return self::$_instance;
    }
 
    public function handle(Context $context) {
        $context->setState(ConcreteStateA::getInstance());
    }
}
class Context { // 环境角色 
    private $_state;
    public function __construct() { // 默认为stateA
        $this->_state = ConcreteStateA::getInstance();
    }
    public function setState(State $state) {
        $this->_state = $state;
    }
    public function request() {
        $this->_state->handle($this);
    }
}
// client
$context = new Context();
$context->request();
$context->request();
$context->request();
$context->request();
?>

<?php
class Button{}
class Border{}
class MacButton extends Button{}
class WinButton extends Button{}
class MacBorder extends Border{}
class WinBorder extends Border{}
interface AbstractFactory {
    public function CreateButton();
    public function CreateBorder();
}
class MacFactory implements AbstractFactory{
    public function CreateButton(){ return new MacButton(); }
    public function CreateBorder(){ return new MacBorder(); }
}
class WinFactory implements AbstractFactory{
    public function CreateButton(){ return new WinButton(); }
    public function CreateBorder(){ return new WinBorder(); }
}
?>

<?php
class Button{/* ...*/}
class WinButton extends Button{/* ...*/}
class MacButton extends Button{/* ...*/}
interface ButtonFactory{
    public function createButton($type);
}
class MyButtonFactory implements ButtonFactory{
    // 实现工厂方法
    public function createButton($type){
        switch($type){
            case 'Mac':
                return new MacButton();
            case 'Win':
                return new WinButton();
        }
    }
}
?>

<?php
abstract class AbstractClass { // 抽象模板角色
    public function templateMethod() { // 模板方法 调用基本方法组装顶层逻辑
        $this->primitiveOperation1();
        $this->primitiveOperation2();
    }
    abstract protected function primitiveOperation1(); // 基本方法
    abstract protected function primitiveOperation2();
}
class ConcreteClass extends AbstractClass { // 具体模板角色
    protected function primitiveOperation1() {}
    protected function primitiveOperation2(){}
 
}
 
$class = new ConcreteClass();
$class->templateMethod();
?>

<?php
abstract class Responsibility { // 抽象责任角色
    protected $next; // 下一个责任角色
 
    public function setNext(Responsibility $l) {
        $this->next = $l;
        return $this;
    }
    abstract public function operate(); // 操作方法
}
 
class ResponsibilityA extends Responsibility {
    public function __construct() {}
    public function operate(){
        if (false == is_null($this->next)) {
            $this->next->operate();
        }
    };
}
class ResponsibilityB extends Responsibility {
    public function __construct() {}
    public function operate(){
        if (false == is_null($this->next)) {
            $this->next->operate();
        }
    };
}
 
$res_a = new ResponsibilityA();
$res_b = new ResponsibilityB();
$res_a->setNext($res_b);
?>